If I found the right data for your car on line, you have 10.1:1 compression, so that begs for something to retard knock. My 02 RSX-S has 11:1, so I really have no choice. My guess is you could get away with something like a mid-grade/plus rather than full high octane premium. Most cars that run on the cheap stuff are around 8.5-9.2:1.
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